Support for throat-plates of sewing-machines.



No. 776,870. PATENTED NOV. 29, 1904. F. L. WHITNEY.

SUPPORT FOR THROAT PLATES 0F SEWING MACHINES.

APPLICATION FILED MAE. 1, 1904.

N0 MODEL.

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FRANK L. WHITNEY, OF LINCOLN, NEBRASKA, ASSIGNOR OF ONE-HALF TOFREDERICK HERMAN,

OF LINCOLN, NEBRASKA.

SPECIFICATION forming part of Letters Patent No. 776,370, dated November29, 1904.

Application filed March 1, 1904.

T at whom it 71210 concern: 7

Be it known that I, FRANK L. WHITNEY, a citizen of the United States,and a resident of Lincoln, in the county of Lancaster and State ofNebraska, have invented certain new and useful Improvements in Supportsfor Throat- Plates of Sewing-Machines, of which the following is aspecification.

The throat or needle plates of sewing-machines are made quite thin inorder to accommodate working parts located immediately beneath them.They are hence elastic to a considerable degree and correspondingly failto afford a firm or rigid support for the work I 5 being sewed, so thatthe needle encounters more friction in piercing the work. Further, incase the needle is broken or becomes bent in use it will strike thethroat-plate, which is liable to be broken, as well as the shuttle also.

This is especially likely to happen in machines used for manufacturingpurposes.

I have devised a support for the throat-plate which renders it perfectlyrigid, and thus avoids the results above indicated.

The details of construction, arrangement, and operation of parts are ashereinafter described, reference being had to the accompanying drawings,in which- Figure 1 is a bottom plan View of a Wellknown form ofsewing-machine with my improvement applied thereto. Fig. 2 is a verticalcross-section on the line 2 2 of Fig. 1. Fig. 3 is a perspective view ofa portion of the throat-plate and my improved support 3 5 thereforarranged in the relation required for use. Fig. A is a perspective Viewof another form of my improved throat-plate support. Fig. 5 is aperspective view of another form of the support. Fig. 6 is a plan viewof the bed-plate and throat-plate of a sewing-machine, a portion of thethroatplate being broken away to show the arrangement of a support whichis integral with the bed-plate. Fig. 7 is a sectional View of the partsshown in Fig. 6.

I will first describe the invention as exhibited in Figs. 1 to 3,inclusive. A indicates my improved support for a throat-plate B of asewing-machine. The same is constructed Serial No. 195,996. (No modelfland arranged and provided with a needle-hole 5 H in a Well-known manner.(See especially Fig. My support A is constructed of metal and has ahorizontal member 1 and a vertical member 2. The horizontal member 1 isconstructed quite thick, so as to have due 5 5 strength and rigidity,while the vertical portion 2 is beveled or reduced in thickness, asshown. As shown in Figs. 1, 2, the horizontal member 1 is rigidlysecured by a screw 3 to the body-frame of the sewingmachine, 6 while itsnose or beak 2 projects upwardly, the support as a whole being arrangedat a slight angle to the side of the frame X in order that the nose 2may be arranged in due proximity to the needle-hole H in thethroatplate. or, in other words, so that the plate may be duly supportedat a middle point where its elasticity and weakness. are greatest. Itwill be observed in Figs. 1 and A that one side of the horizontal member1 is notched or cut away in order to accommodate one of thesewing-machine attachments; further, that the nose 2 is cut away on oneside, so that its width in one direction is only one-half that of thehorizontal member. Thus the body or horizontal member of the support hasthe requisite strength and rigidity, and the vertical member 2 supportsthe throat-plate at its weakest point, whereby the plate is renderedpractically rigid. The supportA is preferably made adjustable verticallyrelative to the frame X of the machine, so that its nose 2 may beadjusted higher or lower, and thus pressed upward into firm contact withthe throat-plate B. For this purpose the upper side of the 5 horizontalmember 1 may be slightly inclined or beveled and a washer may beinserted be tween it and the bed-frame, as in Fig. 1.

In the forms of my invention illustrated in Figs. A and 5 it isconstructed in two parts, 9 as will now be described. In Fig. A thesupport A has a horizontal member or body portion 1, provided with ascrew-hole in its inner end, and the vertical member or nose 2 isadapted to be secured thereto by a screw 5, the latter passing through avertical slot 6, formed in the nose, as shown. The horizontal member 1is attached to the machine in the same manner as illustrated in Figs. 1to 3; but the nose 2 is adjustable vertically, whereby it may be moreperfectly adapted or accommodated to the throat-plate of a machine thanin the case of the integral support.

In the form of the invention illustrated in Fig. 5 and indicated by A ascrew 7 passes vertically through the right-hand or inner end of thehorizontal member 1 its upper end being in practice adjusted into fir-mcontact with the throat-plate B. It will be understood that the supportmay be attached to the bed-plate instead of the frame X. In Figs. 6 and7 I show a throat-plate support A, formed integral with the bed-plate ofa sew: ing-machine. In other words, it is cast solid with the bed-plateand projects horizontally beneath the throat-plate B and is in firmcontact with the under side of the latter.

By means of my improvement the throatplate or needle-plate is supportedin such manner that it is rendered practically rigid and the needleworks with less friction, especially in heavysewing, while in case theneedle is bent or broken, and thus strikes heavily upon the throat-platethe latter will not be broken, as in machines of ordinary character. Theattachment is simple, cheap, may be easily applied, and may be adjustedas required to better accommodate it to its place.

What I claim is 1. The combination, with the bed and the throat-plate ofa sewing-machine, of an independent and detachable support for saidthroat-plate, the same forming a rigid attachment to the bed andconsisting of a horizontal body having its free end upturned and bearingagainst the throat-plate at a point adjacent to the needle-hole andremoved from the side edges of the throat-plate, as shown and described.

2. The combination, with a throat-plate and a bed whereon its edgesrest, of a support therefor which consists of two members, one beingsecured to the rigid frame and the other adjustably connected with thefirst-named member and its free end bearing upward against thethroat-plate at a point adjacentto the needle-hole, and means forsecuring the two members rigidly together in any required adjustment,substantially as described.

3. As an improved article of manufacture, a support for throat-plates ofsewing-machines, comprising a horizontal member or body portion adaptedto be rigidly secured to the frame, and a vertically-adjustable memberhaving a vertical slot, and a clamp passing through said slot andsecuring the vertical member adjustably in the manner described.

FRANK L. l/VHITNEY.

lVitnesses:

MABEL GRITZNER, E. R. DEPUTY.

